3M 6204, Руководство пользователя

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Configuring Digital I/Os
Configuring Digital I/Os Configuring Digital I/Os
Configuring Digital I/Os
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3M Toll RFID Reader 6204
3M Toll RFID Reader 6204 3M Toll RFID Reader 6204
3M Toll RFID Reader 6204 User’s Guide
User’s Guide User’s Guide
User’s Guide
8.5.
Digi
Digi Digi
Digital Input Alarm Generation
tal Input Alarm Generation tal Input Alarm Generation
tal Input Alarm Generation
The 6204 can be configured to generate an alarm when a digital input is
disconnected or sensor failure is detected. The alarm is triggered when the
signal level on the digital input stays in the specified state longer than the
specified alarm timeout. This behavior can be configured independently for
each digital input.
The configuration variable
dio.in.alarm.logic_leve
l
.<N>
(where <N> is
1,2,3,4) sets whether the alarm is coupled to a input logic level of 0 (low) or
1 (high).
The configuration variable
dio.in.alarm.timeout.<N>
(where <N> is 1,2,3,4)
sets the amount of time, in seconds, to wait for a signal state change. A
value of 0 (default) disables alarm generation.
The digital input logic level is used along with the corresponding digital input
pin timeout value to determine if an alarm (in the form of an event) should
be generated. If a timeout value is set, the input pin is monitored. If the
input pin value does not change during the timeout period AND the input
pin value matches the alarm logic level, the event
event.dio.in.alarm.timeout.n
(where n is the pin number) is generated. This
alarm event generation can be helpful in alerting to the loss of digital inputs
to the reader.